Once again this thread has proved that a lot of pilots operate with a lack of understanding of aviation legislation, and is sad reflection of the variation in standards between various training organisations
Might also reflect the complexity of trying to find an answer in the regs for the question you have, which your post reflects upon
werbil.
Whilst I was extremely confident that a self planned IFR departure was legal, I wasn’t sure of where in the new Part 91 it would be found. It ended up taking quite a bit of digging to find